dad jimmit
A tired, grumpy way to say you're mad, but not mad enough to shout god dammit. It came from the southeast in the 90s and is like a weird cousin of dad gum.
Your brother steals your lunch and you go dad jimmit at him.
Your teacher gives you extra homework and you yell dad jimmit at her.
Your cat knocks over your soup and you scream dad jimmit at the cat.